ABAP Select data from SAP table J_7LBELEG21OLD_POSVF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LBELEG21OLD_POSVF table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to J_7LBELEG21OLD_POSVF. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the J_7LBELEG21OLD_POSVF table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_J_7LBELEG21OLD_POSVF TYPE STANDARD TABLE OF J_7LBELEG21OLD_POSVF,
      WA_J_7LBELEG21OLD_POSVF TYPE J_7LBELEG21OLD_POSVF,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <J_7LBELEG21OLD_POSVF> TYPE J_7LBELEG21OLD_POSVF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LBELEG21OLD_POSVF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LBELEG21OLD_POSVF
  INTO TABLE IT_J_7LBELEG21OLD_POSVF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LBELEG21OLD_POSVF
*  INTO TABLE @DATA(IT_J_7LBELEG21OLD_POSVF2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_J_7LBELEG21OLD_POSVF INDEX 1 INTO DATA(WA_J_7LBELEG21OLD_POSVF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LBELEG21OLD_POSVF ASSIGNING <J_7LBELEG21OLD_POSVF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LBELEG21OLD_POSVF>-ROW1 = 1.
<J_7LBELEG21OLD_POSVF>-VFLKL = 1.
<J_7LBELEG21OLD_POSVF>-SOKOA = 1.
<J_7LBELEG21OLD_POSVF>-STUEC = 1.
<J_7LBELEG21OLD_POSVF>-PREIS = 1.

ENDLOOP.

LOOP AT IT_J_7LBELEG21OLD_POSVF INTO WA_J_7LBELEG21OLD_POSVF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LBELEG21OLD_POSVF-KPEIN, sy-vline,
  WA_J_7LBELEG21OLD_POSVF-GSBET, sy-vline,
  WA_J_7LBELEG21OLD_POSVF-ROW2, sy-vline,
  WA_J_7LBELEG21OLD_POSVF-VFLKL, sy-vline,
  WA_J_7LBELEG21OLD_POSVF-SOKOA, sy-vline,
  WA_J_7LBELEG21OLD_POSVF-STUEC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LBELEG21OLD_POSVF you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_J_7LBELEG21OLD_POSVF TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_J_7LBELEG21OLD_POSVF INTO WA_J_7LBELEG21OLD_POSVF.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_J_7LBELEG21OLD_POSVF_STR, 
ROW1 TYPE STRING,
VFLKL TYPE STRING,
SOKOA TYPE STRING,
STUEC TYPE STRING,
PREIS TYPE STRING,
KPEIN TYPE STRING,
GSBET TYPE STRING,
ROW2 TYPE STRING,
VFLKL TYPE STRING,
SOKOA TYPE STRING,
STUEC TYPE STRING,
PREIS TYPE STRING,
KPEIN TYPE STRING,
GSBET TYPE STRING,
ROW3 TYPE STRING,
VFLKL TYPE STRING,
SOKOA TYPE STRING,
STUEC TYPE STRING,
PREIS TYPE STRING,
KPEIN TYPE STRING,
GSBET TYPE STRING,
ROW4 TYPE STRING,
VFLKL TYPE STRING,
SOKOA TYPE STRING,
STUEC TYPE STRING,
PREIS TYPE STRING,
KPEIN TYPE STRING,
GSBET TYPE STRING,
ROW5 TYPE STRING,
VFLKL TYPE STRING,
SOKOA TYPE STRING,
STUEC TYPE STRING,
PREIS TYPE STRING,
KPEIN TYPE STRING,
GSBET TYPE STRING,
ROW6 TYPE STRING,
VFLKL TYPE STRING,
SOKOA TYPE STRING,
STUEC TYPE STRING,
PREIS TYPE STRING,
KPEIN TYPE STRING,
GSBET TYPE STRING,
ROW7 TYPE STRING,
VFLKL TYPE STRING,
SOKOA TYPE STRING,
STUEC TYPE STRING,
PREIS TYPE STRING,
KPEIN TYPE STRING,
GSBET TYPE STRING,
ROW8 TYPE STRING,
VFLKL TYPE STRING,
SOKOA TYPE STRING,
STUEC TYPE STRING,
PREIS TYPE STRING,
KPEIN TYPE STRING,
GSBET TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LBELEG21OLD_POSVF_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_J_7LBELEG21OLD_POSVF_STR-ROW1 sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-VFLKL sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-SOKOA sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-STUEC sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-PREIS sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-KPEIN sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-GSBET sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-ROW2 sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-VFLKL sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-SOKOA sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-STUEC sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-PREIS sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-KPEIN sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-GSBET sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-ROW3 sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-VFLKL sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-SOKOA sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-STUEC sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-PREIS sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-KPEIN sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-GSBET sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-ROW4 sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-VFLKL sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-SOKOA sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-STUEC sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-PREIS sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-KPEIN sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-GSBET sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-ROW5 sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-VFLKL sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-SOKOA sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-STUEC sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-PREIS sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-KPEIN sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-GSBET sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-ROW6 sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-VFLKL sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-SOKOA sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-STUEC sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-PREIS sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-KPEIN sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-GSBET sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-ROW7 sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-VFLKL sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-SOKOA sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-STUEC sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-PREIS sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-KPEIN sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-GSBET sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-ROW8 sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-VFLKL sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-SOKOA sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-STUEC sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-PREIS sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-KPEIN sy-vline 
WA_J_7LBELEG21OLD_POSVF_STR-GSBET sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.